This game does the same thing with the final.boss, how is somebody who doesn't know who the polygon man is, supposed to just know that's who he is? It doesn't say anywhere Polygon Man fight, just like it doesn't say God of War's Zeus, it just days Zeus.
It is literally the same Zeus from GoW. If you didn't know he was from GoW, then you would have researched why he was in the game and immediately found out. I'm sure it explains in his profile. Your excuse that some people havent played GoW is flawed. That's like saying that I didn't know what game Sir Dan was from so I don't think he should be in. Your analogy that Zeus is from greek mythology is wrong. There is no Greek mythology in the PS universe. There's only the games. Zeus comes from GoW which happens to be based on our greek mythology. Stop trolling.
So the people that are saying "we are not using Greek Mytho Zeus, We are using Gow Zeus." Same applys to we are not using ANIME (goku naruto luffy) We are using Video game (goku Naruto Luffy). People STILLLLLLLL dont get that Anime has had such a HUGE success in Playstation sales especiallly in japan where it is sold the most. With over 300 anime titles in exisitence i think that we deserve 1 anime character. Take away all the anime games since start of PS1 and give them all to microsoft and you will see that playstation wouldnt be as popular as it is now. So basically stop being ignorant to the idea of an anime character.